Crushing and grinding machine



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(No Model.) I Y W. H. HOWLAND.

GRUSHING AND GRINDING MACHINE. No. 523,938. Patented July 31, 1894.

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w. H. HOWLAND. GRUSHING AND GRINDING MACHINE.

No. 523,938. Patented July 3141894;

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PATENT O FICE.

OF OHICA Go, ILLINOIS.

"CRUSHING AND GRINDING MACHINE.

SPECIFICATION forming part of Letters Patent No. 523,938, dated July 31,1894. Application filed April 6, 1893- Serial No. 469,245. (No model.)

To all whom it may concern..-

Be it known that I, WILLIAM H. I-IoWLAND, of Oh1 cago, in the county ofCook and State of Ill1no1s, have invented certain new and usefulImprovements in Crushing and Grinding or Pulverizing Machines; I clarethat the following is a full, clear, and exact description thereof,reference being had to the accompanying drawings, and to the letters ofreference markedsthereon, which form a part of this specification. Y r ITh1s invention is in the nature of animprovement upon the machine shownin Letters Patent No. 450,488, granted to me April 14, 1891, theimprovements herein described and claimed relating'principally to themovements of the crushing and grinding jaws.

The objects of the invention are, first, to obtain a more effectivecrushing movement of the upper ends of the jaws; second, to give anadded and a more distinctive grinding movement to the lower ends'ofthejaws, and, third, to provide a' construction by which the lattermovement may be at pleasure discon tinned or restored, so that the samemachine may be used either for themore purely crush ing operation orwith a crushing and more extensive grinding action.

In the accompanying drawings, which illustrate my present improvements,Figure 1 is a plan view of the machine. Fig. 2 is a cen tral verticalsection. Fig. 3 is a side view of the machine frame and section of thetransverse shafts. Fig. 4 is a side view of the lower portions of thecrushing and grinding jaws, particularly iilustrating their connec tionby links. Fig. 5 is a rear view of the lower portion of one of saidjaws, illustrating the links in end view and the actuating pit} man insection, and Fig. 6 isa detached side elevation of one of the eccentricshafts which are applied to the lower ends of the jaws and by which thespace between said lower ends of the jaws may be varied. I

A represents the side members and A the end members of a'rectangularframe which is strengthened against tensile strain by heavy longitudinaltie-bolts A A B B are two parallel transverse shafts mounted in suitablebearings 19 on thesides of the frame, as indicated, and provided witheccentric portionsb between said bearings.

and I do hereby de able outer support.

0 O"are two crushing and grinding jaws mounted at theirupper ends ontheeccentrics b" of the shafts B B so that in the rotation ofsaidfshafts' within the jaws each of said jaws will be given abodilyfup-andrdown movement and a lateral, vibratory movement at itsupper end by the eccentric which carriesit.

The shafts BB are each shown as carrying at one end a fly wheel B and atits opposite end a gearwheelB V D is a third shaft arranged in avertical plane midway between the shafts'B'B, and having its bearings atd on one of the sides A of the frame and the other at d upon a suit-This. shaft D carries a driving pulley D and also a gear wheel D. whichmeshes-with both the equal gear wheels 13 on the shaftsB B.

The gear wheels B on the shafts B B being out of mesh witheach other andin mesh with said intermediate wheel'D rotation of the latter givesrotation tothe shafts B B in the same direction. In this respect themachine here shown difiers from that shown in my aforesaid prior patentwherein the wheels upon the shafts B B were of larger diameter andintermesh with each other and the shafts D and E and theirconnections of,the present construction are absent. I

E is a fourth shaft parallel with the'others and having a gear wheel Esecured thereon and intermeshedwith one of the, wheels B with which itis equal in diameter. Said shaft'E has also a central eccentric portionE to which is fitted one end of a pitman E the opposite end of which isjointed upon a wrist or-shaft F'connected with the lower end of theadjacent crushing jaw O. This shaft F extends across the outer face ofthe crushing jaw O and projects at its ends'beyond it. The opposite jawis provided with a similar sh'aft F, and upon the projecting ends ofsaid shafts F F are .fitted links G G which hold the lower ends of thejawsat a' given required distance apart andcommunicate motion from thejaw which is actuated by the pitman F. to the opposing jaw. In therotation of the eccentric shaft E, therefore, the lower ends of the jawsO C are swung sidewise on the eccentric portions 6' of the shafts B B astheir axes, and if, at the same time,

said shafts B B be rotated, the jaws have both avertically reciprocatingand a horizontally vibrating movement at their upper ends together witha laterally and vertically vibratory movement at their lower ends.

The shafts B B may be set with the longer radii of their eccentrics b inany desired relation to each other, as, for example, either oppositelydirected or at right angles. In the former case they will obviously givethe utmost possible range of approach andrecession to the upper ends ofthe jaws and the vertical movements ofthe jaws will be synchronousthroughout. In the latter case there will be aless range of recessionand approach on the part of the upper ends of the jaws, which will thenhave movement in the same lateral direction at difierent speeds and withrelative approach during a part of their vibration, and relativerecession at unequal speeds during the remainder of such vibration,while the vertical, bodily movements of the jaws will be correspondinglyanachronous.

With the shaft E in operation simultaneously with the shafts B B,whatever the relative adjustment of the eccentrics b to each other, therelative movements of the jaws will be modified, the normal efiect ofvibration of the lower ends of the jaws being to produce a relativevertical reciprocating movement of the inner faces of the jaws inopposite directions. The practical effect of such vibration of the lowerends of the jaws O C is to produce a vertical rubbing or riddlingbetween them of the substances being operated upon, which may be calleda grinding action as distinguished from a crushing action. The vibrationof the lower ends of the jaws, therefore, increases the grinding actionof the machine and better adapts it to I the combined work of crushingand grinding or pulverizing. By making the shaft E of sufficient lengthto allow the gear wheel thereon to be slipped out of engagement with theadjacent gear wheel B said shaft E either may be rendered non-rotativeor independently rotative. In the former case it will serve, through thepitman E to hold the lower ends of the jaws O C in place while they areactuated exclusively by the shafts B B. In the latter case the shafts BB may be left at rest and the sole movement of the jaws may be thevibration of their lower ends. For such separate rotation of the shaft Eit should, of course, be provided with a belt pulley, not shown.

To adjust the distance between the lower ends of the converging jaws C Cand therefore to vary the fineness of the product, or to compensate wearof the jaw faces, any suitable form of device may be provided, thatherein shown consisting in the provision of eccentric portions f uponthe shafts F, F. These eccentric portions of the said shafts areembraced beneath caps 0 which are bolted to the jaws and are adapted tobe clamped so firmly against the shafts as to prevent their rotation. Byrelaxing the clamping bolts the shafts will be loosened and they maythen be turned to any desired extent by means of a lever inserted ineither of the holes f in said shafts, or by other means. When adjusted,they are again secured against rotation by setting up the cap bolts, asbefore. H H are stationary plates which are supported one on each sideof the converging jaws C O and opposite the space between them toconfine the material being operated upon. As shown in Fig. 1, where oneof said plates is seen in top view, they may be conveniently 'heldinplace by angle plates or brackets H which project horizontally from themand are bolted to the side members A of the frame.

A suitable hopper I (Fig. 2) may, if desired, be supported over thespace between the jaws by legs which rest upon the brack- .ets H and maybe bolted in place with the latter.

It is to be understood that other forms of.

means for vibrating the lower ends of the jaws C 0' may be employed ifdesired, and that the means used for that purpose maybe employed inconnection, with the eccentric shafts geared directly to each other orotherwise geared to run in opposite directions, as set forth in myaforesaid prior patent; and, generally, I desire it to be understoodthat changes in form and detail may be made throughout the machinewithout departure from my invention.

I claim as my invention- 1. The combination with the converging jaws, ofrotary shafts having eccentrics engaging the ends of said jaws, andmeans for too vibrating their other ends whereby said jaws are given acombined opening and closing and relative longitudinal rubbing movementtending to both crush and pulverize the material. j

2. In a crushing and pulverizing machine,

the combination with two downwardly converging jaws, of rotary shaftshaving eccentrics engaging the upper ends of said jaws, links connectingtheir lower ends and means for vibrating said lower linked ends.

3. In a crushing and pulverizing machine the combination with twodownwardly converging jaws, of rotary shafts having eccentrics engagingthe upper ends of the jaws, links connecting their lower ends, and adriving shaft and pitman connected with said lower ends to vibrate thesame.

4:. The combination with the downwardly converging jaws, of rotaryshafts geared to rotate in opposite directions and provided witheccentrics engaging the jaws, and means for vibrating the lower ends ofthe jaws.

5. In combination with downwardly converging crushing jaws, rotativeshafts having eccentrics on whichsaidjaws are severally supported, linksconnecting the lower ends of the jaws, and an eccentric shaft carrying apitman which is connected with the lower end of one of said jaws, thesaid shafts being geared to run at equal speeds.

6. In combination with the eccentric, jawcarrying shafts, having equalgear Wheels thereon, and links connecting the lower ends of the jaws, athird eccentric shaft and a pitman connected therewith and with oneof'said jaws, and a gear wheel on said pitman-actuating shaft adapted tobe engaged with and disengaged from one of the gears of the jawcarryingshafts, whereby either the upper ends or the lower ends of said jaws maybe alone actuated or both ends of said jaws may be simultaneouslyactuated, as desired.

7. The combination of the shafts B B having eccentrics b b, the jaws C Cmounted lower ends of the jaws, the shaft E provided with'an eccentricand geared with one of the shafts B B, and the pitman connecting theeccentric of the shaft E with the adjacent jaw. 8. In combination withthe vibrating jaws, the adjustable eccentric shafts applied to said jawsand carrying the connecting links. In testimony that I claim theforegoing as my invention I affix mysignature inpresence of twowitnesses.

WILLIAM H. HOWLAND. Witnesses:

M. E. DAYTON, TAYLOR E. BROWN.

